I've taken up an unfortunately hobby recently - trying to collect cassette singles and maxi-singles. The problem? THEY ARE NOWHERE TO BE FOUND. Singles, I come across every now and then (usually nothing I remember owning as a kid).... maxi-singles, forget it. It's like they never existed at all. So my question is, where in Pittsburgh could I look? Tried various Goodwills, those are usually light on cassettes (or nothing at all). Same with Half Price Books, tried two of those so far. Exchanges *sometimes* carry cassettes, but not often. Even went to the flea market today (Trader Jack's) with no luck. Other than spending $30 a pop on Discogs, which they tend to be, where can I find singles and maxi-singles around Pittsburgh??